#19 Fixed possible hard Crash when scanning files.

ROMVault2/SupportedFiles/Files/UnCompFiles.cs

@@ -26,11 +26,7 @@ namespace ROMVault2.SupportedFiles.Files
             bSHA1 = null;
             crc = null;
 
-            Stream ds;
-            int errorCode = IO.FileStream.OpenFileRead(filename, out ds);
-            if (errorCode != 0)
-                return errorCode;
-
+            Stream ds=null;
             CRC32Hash crc32 = new CRC32Hash();
 
             MD5 md5 = null;
@@ -38,6 +34,12 @@ namespace ROMVault2.SupportedFiles.Files
             SHA1 sha1 = null;
             if (testDeep) sha1 = SHA1.Create();
 
+            try
+            {
+                int errorCode = IO.FileStream.OpenFileRead(filename, out ds);
+                if (errorCode != 0)
+                    return errorCode;
+
                 long sizetogo = ds.Length;
 
                 while (sizetogo > 0)
@@ -56,6 +58,15 @@ namespace ROMVault2.SupportedFiles.Files
                 if (testDeep) sha1.TransformFinalBlock(Buffer, 0, 0);
 
                 ds.Close();
+            }
+            catch
+            {
+                if (ds != null)
+                    ds.Close();
+
+                return 0x17;
+            }
+
 
             crc = crc32.Hash;
             if (testDeep) bMD5 = md5.Hash;